4 years from now, Rina’s father’s age will be 2 times Rina’s age. Rina is now 13. How old is her father now?
Correct answer(s):
- 30
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Solve the proportion: 3/3 = 13/x.
Correct answer(s):
- 13
Expand: (x + 2)^2.
Correct answer(s):
- x^2 + 4x + 4
Simplify: (m^6)^4.
Correct answer(s):
- m^24
A line has slope 3 and y-intercept 6. Which equation represents the line?
Correct answer(s):
- y = 3x + 6
Find an expression for the nth term of the arithmetic sequence: 0, 6, 12, 18, …
Correct answer(s):
- 6n - 6
Solve the inequality: -5x – 1 ≤ -31.
Correct answer(s):
- x ≥ 6
Evaluate -6x + y – 7 when x = -3 and y = -3.
Correct answer(s):
- 8
Expand and simplify: 5(7x – 1).
Correct answer(s):
- 35x - 5
A shop charges a fixed delivery fee of 9 taka plus 3 taka for each notebook. If the total cost is 21 taka, how many notebooks were ordered?
Correct answer(s):
- 4
Find x if 6x + 15 equals 45.
Correct answer(s):
- 5
For the expression 1/(x – 6), which value of x is not allowed?
Correct answer(s):
- 6
Which expression represents ‘the sum of a number x and 8, divided by 3’?
Correct answer(s):
- (x + 8)/3
A linear rule produces these values: x=3 gives y=-3, x=-1 gives y=1, x=6 gives y=-6. Which rule matches the table?
Correct answer(s):
- y = -x
Select all expressions equivalent to 3x + 6.
Correct answer(s):
- 3(x + 2)
- 3x + 6
The sides of a rectangle are (4x + 8) cm and (4x + 1) cm. Which expression represents its area?
Correct answer(s):
- 16x^2 + 36x + 8
7 years from now, Rina’s father’s age will be 2 times Rina’s age. Rina is now 15. How old is her father now?
Correct answer(s):
- 37
Solve the proportion: 10/5 = 28/x.
Correct answer(s):
- 14
Expand: (x + 4)^2.
Correct answer(s):
- x^2 + 8x + 16
Simplify: p^8 ÷ p^4, where p ≠ 0.
Correct answer(s):
- p^4